Nachiappan, Arun C., and T. S. Selvavinayagam. “E-Cigarettes: Promise or Threat?”. International Journal Of Community Medicine And Public Health 4, no. 9 (August 23, 2017): 3059–3067. Accessed October 28, 2025. https://www.ijcmph.com/index.php/ijcmph/article/view/1901.